Amazon Fire HD 8 2017 (amazon-douglas)
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| This device runs a Downstream kernel. Some UIs will not work, and most features (3D acceleration, audio, etc.) may be broken. | 
| 
 Fire HD 8 2017 booted and running weston.  | |
| Manufacturer | Amazon | 
|---|---|
| Name | Fire HD 8 (2017) | 
| Codename | amazon-douglas | 
| Released | 2017 | 
| Type | tablet | 
| Hardware | |
| Chipset | MediaTek MT8163 | 
| CPU | Quad-core 1.3 GHz Cortex-A53 | 
| GPU | Mali-T730MP3 | 
| Display | 800 x 1280 IPS LCD | 
| Storage | 16GB or 32GB | 
| Memory | 1.5 GB | 
| Architecture | aarch64 | 
| Software | |
Original software The software and version the device was shipped with.  | 
    Android (Fire OS) 5.1 (Fire OS 5.3.7.1) | 
Extended version The most recent supported version from the manufacturer.  | 
    Android (Fire OS) | 
| postmarketOS | |
| Category | downstream | 
Mainline Instead of a Linux kernel fork, it is possible to run (Close to) Mainline.  | 
    no | 
pmOS kernel The kernel version that runs on the device's port.  | 
    3.18.19 | 
| Device package | 
 | 
| Kernel package | 
 | 
Flashing Whether it is possible to flash the device with  pmbootstrap flasher. | 
    
 Partial 
 | 
|---|---|
USB Networking After connecting the device with USB to your PC, you can connect to it via telnet (initramfs) or SSH (booted system).  | 
    
 Works 
 | 
Battery Whether charging and battery level reporting work.  | 
    
 Works 
 | 
Screen Whether the display works; ideally with sleep mode and brightness control.  | 
    
 Works 
 | 
Touchscreen  | 
    
 Works 
 | 
| Multimedia | |
3D Acceleration  | 
    
 Broken 
 | 
Audio Audio playback, microphone, headset and buttons.  | 
    
 Broken 
 | 
Camera  | 
    
 Untested 
 | 
| Connectivity | |
WiFi  | 
    
 Broken 
 | 
Bluetooth  | 
    
 Broken 
 | 
| Miscellaneous | |
FDE Full disk encryption and unlocking with unl0kr.  | 
    
 Untested 
 | 
USB OTG USB On-The-Go or USB-C Role switching.  | 
    
 Broken 
 | 
| Sensors | |
Accelerometer Handles automatic screen rotation in many interfaces.  | 
    
 Untested 
 | 
Contributors
Users owning this device
Known Issues
- When accessing the audio device (such as via 
hwtest), the device freezes. After reboot you may be prompted with a "Collecting Logs" screen with an Amazon logo, indicating some sort of firmware level log collector. - CPU1,2,3 continuously enable and disable themselves, with logs such as:
 
[ 378.053320] -(3)[0:swapper/3]CPU3: Booted secondary processor [ 378.053334] -(3)[0:swapper/3][name:cpuinfo&]Detected VIPT I-cache on CPU3 [ 378.053385] -(3)[0:swapper/3][name:topology&]CPU3: update cpu_capacity 1024 [ 378.122632] (0)[1829:kworker/0:2][name:mtk_wcn_stub_alps&][cmb_stub] thermal_ctrl_cb null [ 378.342631] -(0)[1600:kwin_wayland][name:sched_monitor&][BURST IRQ DURATION WARN] IRQ[ 51:musb-hdrc.0.auto] +1237 ( dur 30000 us , avg 24 us) [ 379.122661] (0)[1829:kworker/0:2][name:mtk_wcn_stub_alps&][cmb_stub] thermal_ctrl_cb null [ 380.053771] (1)[71:hps_main][name:smp&]CPU3: shutdown
- Although the kernel can detect plugged in USB keyboard, nor X neither wayland can use the keyboard. evtest works tho. USB drives also mounts correctly..
 
How to enter flash mode
- You need to be bootloader unlocked via this method: https://forum.xda-developers.com/hd8-hd10/orig-development/unlock-fire-hd-8-2017-douglas-t3962846.
 - After unlock, the normal fastboot doesn't let us flash in the required partitions? See notes on Amazon Fire HD 10 (amazon-suez).
 - Holding + gets you into TWRP.
 - Flash with the ADB sideload method.
 - However, the default recovery.zip generated by pmbootstrap flashes into the boot partition, not the boot_x partition which is what is needed for this device. The recovery.zip file has to be manually editted to replace 
bootwithboot_xinchroot/install_optionsandchroot_bin/pmos_install_functions. Again, see notes on Amazon Fire HD 10 (amazon-suez). 
Alternatively, you can flash just the boot_x partition and then flash the rest of the system on an external sdcard:
pmbootstrap install --sdcard=/dev/...: This will install the rootfs on a SD card mounted on your computer.fastboot flash boot_x boot.img-amazon-douglas: This will flash the initramfs onto the device.- Then remove the sd card from your computer and insert it into the device. Then reboot it.
 - Future updates to the rootfs does not require additional fastboot operations.
 
See also
- pmaports!1304 Initial merge request